Automatic drilling-machine.



' AUTQMATIG DRILLI-NG MAGHINE.

APPLICATION FILED AUG. .1, 1965.

29 Fieri Flare.

35 mul nur www 3'* PATENTED JUNEflB, 1907.

L E RICE AUTOMATIC DRILL-ING MACHINE.

- APPLIoATIoN FILED AUG. 1, 1905.

' 2 sHEBTs-s-HEBT 2.

meansf ATTORNEY f u ihl UNITED STATES T OFFICE.

.LOUIS EARL RICE, OF SALEM, OHIO, ASSIGN OR TO THE SILVER MAN UFAC- TURIN G COMPANY, A CORPORATION OF OHIO. AUTOMATIC DRlLLlNG-IVIACHINE.

specification of Letters Patent.

Application led August l, 1905. Serial No. 272,201.

l (not shown) and locked by a pawl and ratchet or other suitable device 8.

The drill spindle 9 is mounted in bearings l10, and is connected to receive motion from a drive shaft 11, through a train of changeable speed gears 12, 13, 14, 15, 16 and 17. The shaft 11, carries fast and loose pulleys 18, 19, and is driven by a belt in the usual manner.

No. 857,538. Patented June 18, 1907.

T if/ZZ whom, t vat/,Ly concern:

Be it known that I, RICE, a citizen of the United residing' at alein, county of Columbiana, and State of Ohio, have invented certain new and useful of which the following is a specifica- My invention relates generally to drilling io mac iines and as herein embodied is designed independently upon the shaft 11, and aie to produce a machine of this class, which eac i provided with a key 20, movable in and after being set or Given the necessary pi elimiout of engagement with a key-way 21 formed naiy adjustment in accordance with the retherein. Each of the keys terminates in a quireinents of the work, will thereafter o erprojecting knob oi button 22 for conveni 5 ate automatically, requiring only that the ience in adjusting the same and they are held work be secured in position and removed in either of two positions of adjustment that when completed. is, in or out of engagement with the key-way he object of the invention is to insure uniof the shaft, by a spring pressed ball or pin iorinity and Greater accuracyin the work pro` 23, which co-operates with twin seats or reduced, also to increase the output of the macessses 24, 24, formed therein as shown in c iine and at t ie same time eifect a saving in Fig. 5. Either of the gears 12, or 13, may oth time and labor, by dispensingr with the therefore be secured to rotate with the shaft. constant attendance of a skilled workman. he gears 14 and 15, loosely mounted upon. he accompanying drawings will serve to a stud shaft 25, are provided with interlock- 25 illustrate a machine suitable for carrying my ing projections 26, suoli for example as Shown invention into effect.. I wish it understood, upon the gear 12, in Fig. 5, or they may be however, that I do not limit myself to either otherwise connected to rotate together and the coiistiuctioii or arrangement of tlieiiiechare driven by either the gear 12 or 13 deanism shown, as vaiious changes may be pending upon which of these gears is locked made therein or other forms of mechanism to the drive shal't.

employed operating in substantially the From the gear 14 motion is transmitted to sameinanner to produce practically the saine the spindle through the bevel gears 16 and result. he gear 16, turns loosely upon a stud In the drawings: Figure 1, is a view in side shaf t 27 and has spur teeth 28, formed thereelevation ofadrilling machine, constructed in on as shown in Fig. 3, to mesh with the gear accordance with my invention. Fig. 2, is a 14. he gear 17 is keyed or otherwise conview in front elevation, thereof. Fig. 3, is a nected to drive the spindle and at the same plan view partly in section. Fig. 4, is an entime permit end-wise movement thereof as large-d detail view partly in section, showing required in advancing and retracting the .LO the feed mechanism by which the drill spindle drill relatively to the work upon the table 4. is advancedrelativelyto thework. Fig. 5,isa ien the spindle is to e driven at low detail view of one ofv the speed changing speed motion is transmitted through the gear gears, and F ig. 6, illustrates the trip latch in 12, the key of which is adjusted to interlock detail. with the key-way in the shaft 11, while the Referring now to the drawings: 1, repregear 13 turns loosely thereon. For medium sents a frame designed to provide support for the various parts of the machine.A The frame is carried by a column 2, supported by a step 3, and mounted upon the column, there is a vertically adjustable swing-table 4.

The table may b raised and lowered by speed, the gear y13 is caused to act as the driver by being similarly keyed to the shaft and the gear 12 turns idly. For fast speed, the gears 12 and 15, are interchanged, the gear 15, being provided for this purpose wi th an adjustable key as shown in Figs. 1 and 3 to lock the same upon the shaft and the gear 12 with projections 26, to 1interlock with and rotate the gear 14.

means of an attached chain 5, running over a pulley 6, and winding upon a shaft 7, which is ordinarily rotated by a removable crank IOO Connected to the spindle at its upper end there is a feed screw 29, with which a split feed nut 30 co-operates as shown in detail in Fig. 4, The parts or members of the feed nut are carried by links 31, pivotally secured at one end thereof to a sleeve 32, and provided at the opposite end with studs or projections 33, entering cam slots 34, in a secon sleeve 35. As arranged, these parts, that is, the link-connected sleeves and the interposed feed nut are designed to rotate together, motion being given the same by suitable gearing such as the worm wheel 36 and worm 37, mounted to be driven from the shaft 11, by a belt passing around cone pulleys 3S, 39.

In order that the advance of the drill or other tool under the action of the feed may be predetermined and automatically controlled, l provide means for periodically throwing the feed in and out of operation at definite points in the travel of the spindle. Mechanism suitable for this purpose will now be described.

As shown in Fig. 4, vided with an annular groove the forked end of an arm pin 42. Thus arranged, the sleeve 35, is given motion lengthwise of the spindle, when 41, is rocked, causing the cam slots the sleeve 35, is pro- 40, to receive the arm 34, in the sleeve to co-act with the links 31, and move the members of the split feed nut carried thereby in an out of engagement with the threaded portion of the spindle. lever 43, loosely mounted upon the pivot pin 42 of the arm 41, is connected with the free end of the latter by an eye-bol bolt extends through a lug 45 on the lever and encircling its projecting end and held thereon by a nut 46, there is a spring 47, which acts upon the arm 41, tending normally to move its forked end downward an throw in the feed. As will be seen the adjustment of the feed is' controlled by the lever 41, which is adapted to be operated either by hand or power. For convenience in shifting the lever by hand, its free end projects toward the front of the machine and is shaped to be conveniently grasped by the operator. At the opposite end of the lever, there is an automatic trip latch 48, which is pivoted thereon at 49. rl`he latch, as shown in detail in Fig. 6, is provided upon one side with the lugs 50, 50, and upon the opposite side with a pin or stud 51, which projects through an elongated opening 52, in the lever and is normally held about centrally thereof by two pivoted ngers 53, 53, spring held against a stop lug 54. (lo-operating with the latch, there is a trip-pin 55, carried by a rocker-arm 56. rllhe rocker-arm is mounted free to turn upon the pin 42 and is connected through a rod 57, to receive motion from an eccentric 58, upon the drive shaft 11. The trip-pin 55, projects through an opening 59, in the frame 1, and terminates j adjacent to the latch,

movement upper lug lightly motion thereto, clearing 41, pivoted upon .a l

the arrangement being normally, or when the feed is as shown in Fig. 4, the path of of the trip-pin is in line with the of the latch and strikes the saine the up stroke without imparting the lower lug on the such th at thrown in,

l on

down stroke.

The adjustment of the latch 48 relatively to the trip-pin, is effected automatically by means of a device shown in Fig. 1. This device consists of a gage-bar 60, which is connected through a right angle lever 61 and link 62 with the projecting end of the latch-pin 51. The bar 60, is slotted at 63, and fitted in the slot thereof, there are two stop buttons 64, 64, the relative position or spacing o which determines the travel or movement o the drill spindle as will be later on described. The buttons are adjustable and may be secured at any point in the slot in the bar, thus enabling the operator to place the same definitely in the preliminary adjustment of the machine in accordance with the requirements of the work.

A lever 65, co-acting with the stop-buttons serves to impart the required motion to the bar to shift the latch. The lever 65 is pivoted upon the frame at 66, and connected by links 67, to receive motion from the drill spindle, as it is fed downward to advance the tool to the work. At its free end, the lever terminates in a handle 68, which projects forward within convenient reach of the operator and at the opposite end, a spring 69, is attached thereto, acting through the lever and connecting links 67 to return the spindle to its normal position, when the feed is thrown out.

As a means of retaining the feed mechanism in position as adjusted, a spring pressed locking arm 70, is employed in connection with the lever 43, and serves to yieldingly hold the same against play.

The operation will be generally understood from the foregoing description and l will therefore describe the same briefiy.

Assuming that the gearing is properly adjusted to drive the drill spindle at the required speed, the feed is thrown out by moving the lever 43, upward and the spindle is then lowered by means of the lever 65, until the drill or other tool reaches the point where it is to begin work. The upper'stop button 64, is next adjusted until it rests upon the lever 65, and is locked in this position, th limiting the upward travel of the drill at this y oint. rl`he spindle is then moved downward until the tool rests upon the table 4, or to a point where the work is completed and the lower stop button 64, is adjusted relatively to the lever 65, thus fixing the lower point of travel of the spindle. These points having been determined to suit the work an the buttons upon the gage bar being now IOO power shaft and means whereby said coniinuously operated means may be connected io the feed mechanism for throwing the feed 857,538 g properly set, the next step is to start the drill l into and out of operation to limit the movein operation and as this is done the fee is l ment of the spindle. automatically thrown in by the action of the 5. In a drilling machine, a rotatable drillspring 69, an tie spindle begins to feed ing spindle, feed mechanism therefor, apower downward. As the lever 65 strikes the lower shaft, tripping mechanism arranged to be utton of the gage bar, the latch 48, is! continuously operated by said power shaft, 7o shifted toward the right as viewed in Fig l or throwing the feed mechanism into and an ie tiip pin acts upon the lower lug outo operation alatch connected with said thereof, and rocks the levers ll and 43tlirowfeed mechanism, a gage-bar having adjusting out t e fee as above described and able stops thereon connected to said latch, thereupon the spindle is instantly carried upand means connected to the spindle and-arwaid by t ie spring 69. In t e return of the ranged to engage said stops. a spindle, the lever 65 moving with the same 6. The combination with feed mechanism, strikes the upper button of the Oage bar and of a co-operating trip device comprisin(T a through the connections described shifts the trip pin, means for giving said pin a back and l latch toward the left and the trip pin acting forth movement in a definite path of travel, a 8o now upon the u per lug thereof, throws in o o-operating latch normally clear of the trip the feed and thereafter the spindle continues pin and connected with said feed mechanism, to feed down and return automatically withand means for shifting the latch relatively to out requiring further attention, it being nect e pin. essary to place andremove the work as 7. The combination ofa drill spindle, re above stated. uisite gearing co-operatin@ therewith feed Having thus described my invention, I mechanism for giving the spindle motion in claim: e direction of its length means tendiiiop to 1. A drilling machine comprising a rotaretract said spindle, a trip device for enea( table drill spindle, a tripping device, means ing and disengaging the feed comprising are- 9o for driving said spindle and said tr'ppng deciprocating trip pin, a co-operating latch convice, feed mechanism for giving the spindle nected with the feed mechanism, and means motion in the direction of its length, and for periodically shifting the latch relatively means for automatically connecting the tri to the pin to throw the feed in and out of operping device with the feed mechanism for ation at predetermined points in the path of t rowing the feed in and out of operation at travel of the spindle. predetermined points in the travel of the 8. The combination of a rotatable drill spindle. spindle a power shaft therefor a feed screw 2. A drilling machine comprising a rotaoperatively connected with the spindle, a rotable diill spindle a power shaft therefor tatable feed nut alever arm connected with loo eed mechanism for giving the spindle mosaid feed nut an automatic trip device adapttion in one direction only, a tripping device ed to be continuously operated by the power adapted to be continuously driven by said shaft, alatch carried bysaid lever and means power shaft, and means for autoinaticall for periodically shifting the latch into the connecting' the tripping device with the feed pat of the trip device and causing the lever 105 mechanism for throwing the feed in and out arm to shift the nut into engagement with of operation at predetermined points in the e feed screw. travel of the spindle. 9. The combination of a rotatable drill 3. A drilling machine comprising a rotaspindle, a feel screw operatively connected table drill spindle, areciprocatory tripping dewith the spindle, feed mechanism comprising I Io vice, feed mechanism for giving t e spindle pivoted links and split feed nut members motion in one direction only to advance it pivoted thereto, a cain-meiiiber connected toward the work a latch connected with said with said links, a lever arm connected with ee mechanism and normally clear of said said cam-member, a trip device, and means trippin0 device, and means for autoinaticall to periodically connect the lever arm with the I I 5 shiftin(T the latch into the path of the tri trip device. ping device for throwing the feed in and out 10. An automatic feed mechanism comof operation at predetermined points in the prising a feed screw, -a rotary sectional feed travel of the spindle. nut, pivoted supports to which the members 4. A drilling machine comprising alrotaof the feed nut are pivotally secured, cams 12o table drill spindle, a power shaft therefor, co-actinv to impart movement to the supfeed mechanism for advancing the spindle ports to shift the nut in and out of engagerelatively to the work, means tending norment 'with the feed screw a lever for operatmally to retract the spindle, and means aring t e cams and an automatic trip latch ranged to be continuously operated by the controlling the lever.

screw, links pivoted upon the sleeve and supand provided with cam slots to receive the 15 porting the members of the feed nut, a secfree ends of the links, means for rotatingthe ond sleeve loosely mounted upon the feed link connected sleeves and the feed nut carscrew and provided with cam portions eni ried thereby, and means for producing rela- 5 gaging the links, and means for giving mol tive motion between the sleeves lengthwise of tion to the last named sleeve to effect an l the feed screw to cause the cam controlled zo opening and closing of the feed nut relatively l links to open and close the feed nut.

to the feed screw. ln testimony whereof, I affix my signature,

12.. An automatic feed mechanism coinin the presence of t'wo witnesses. 1o prismg a feed screw, a loose sleeve thereon, a LOUlS EARL RCE sectional feed nut co-operating with the feed screw, links pivoted upon the sleeve and sup- Vitnesses: porting the members of the feed nut, a secon F. J. MULLiNs, sleeve loosely mounted upon the feed screw J. R. CAREY. 

